// VERSION: 2.3 LAST UPDATE: 11.07.2013
/* 
 * Licensed under the MIT license: http://www.opensource.org/licenses/mit-license.php
 * 
 * Made by Wilq32, wilq32@gmail.com, Wroclaw, Poland, 01.2009
 * Website: http://code.google.com/p/jqueryrotate/ 
 */

(function($) {
	var supportedCSS, supportedCSSOrigin, styles = document.getElementsByTagName("head")[0].style,
		toCheck = "transformProperty WebkitTransform OTransform msTransform MozTransform".split(" ");
	for(var a = 0; a < toCheck.length; a++)
		if(styles[toCheck[a]] !== undefined) {
			supportedCSS = toCheck[a];
		}
	if(supportedCSS) {
		supportedCSSOrigin = supportedCSS.replace(/[tT]ransform/, "TransformOrigin");
		if(supportedCSSOrigin[0] == "T") supportedCSSOrigin[0] = "t";
	}

	// Bad eval to preven google closure to remove it from code o_O
	eval('IE = "v"=="\v"');

	jQuery.fn.extend({
		rotate: function(parameters) {
			if(this.length === 0 || typeof parameters == "undefined") return;
			if(typeof parameters == "number") parameters = {
				angle: parameters
			};
			var returned = [];
			for(var i = 0, i0 = this.length; i < i0; i++) {
				var element = this.get(i);
				if(!element.Wilq32 || !element.Wilq32.PhotoEffect) {

					var paramClone = $.extend(true, {}, parameters);
					var newRotObject = new Wilq32.PhotoEffect(element, paramClone)._rootObj;

					returned.push($(newRotObject));
				} else {
					element.Wilq32.PhotoEffect._handleRotation(parameters);
				}
			}
			return returned;
		},
		getRotateAngle: function() {
			var ret = [];
			for(var i = 0, i0 = this.length; i < i0; i++) {
				var element = this.get(i);
				if(element.Wilq32 && element.Wilq32.PhotoEffect) {
					ret[i] = element.Wilq32.PhotoEffect._angle;
				}
			}
			return ret;
		},
		stopRotate: function() {
			for(var i = 0, i0 = this.length; i < i0; i++) {
				var element = this.get(i);
				if(element.Wilq32 && element.Wilq32.PhotoEffect) {
					clearTimeout(element.Wilq32.PhotoEffect._timer);
				}
			}
		}
	});

	// Library agnostic interface

	Wilq32 = window.Wilq32 || {};
	Wilq32.PhotoEffect = (function() {

		if(supportedCSS) {
			return function(img, parameters) {
				img.Wilq32 = {
					PhotoEffect: this
				};

				this._img = this._rootObj = this._eventObj = img;
				this._handleRotation(parameters);
			}
		} else {
			return function(img, parameters) {
				this._img = img;
				this._onLoadDelegate = [parameters];

				this._rootObj = document.createElement('span');
				this._rootObj.style.display = "inline-block";
				this._rootObj.Wilq32 = {
					PhotoEffect: this
				};
				img.parentNode.insertBefore(this._rootObj, img);

				if(img.complete) {
					this._Loader();
				} else {
					var self = this;
					// TODO: Remove jQuery dependency
					jQuery(this._img).bind("load", function() {
						self._Loader();
					});
				}
			}
		}
	})();

	Wilq32.PhotoEffect.prototype = {
		_setupParameters: function(parameters) {
			this._parameters = this._parameters || {};
			if(typeof this._angle !== "number") {
				this._angle = 0;
			}
			if(typeof parameters.angle === "number") {
				this._angle = parameters.angle;
			}
			this._parameters.animateTo = (typeof parameters.animateTo === "number") ? (parameters.animateTo) : (this._angle);

			this._parameters.step = parameters.step || this._parameters.step || null;
			this._parameters.easing = parameters.easing || this._parameters.easing || this._defaultEasing;
			this._parameters.duration = parameters.duration || this._parameters.duration || 1000;
			this._parameters.callback = parameters.callback || this._parameters.callback || this._emptyFunction;
			this._parameters.center = parameters.center || this._parameters.center || ["50%", "50%"];
			if(typeof this._parameters.center[0] == "string") {
				this._rotationCenterX = (parseInt(this._parameters.center[0], 10) / 100) * this._imgWidth * this._aspectW;
			} else {
				this._rotationCenterX = this._parameters.center[0];
			}
			if(typeof this._parameters.center[1] == "string") {
				this._rotationCenterY = (parseInt(this._parameters.center[1], 10) / 100) * this._imgHeight * this._aspectH;
			} else {
				this._rotationCenterY = this._parameters.center[1];
			}

			if(parameters.bind && parameters.bind != this._parameters.bind) {
				this._BindEvents(parameters.bind);
			}
		},
		_emptyFunction: function() {},
		_defaultEasing: function(x, t, b, c, d) {
			return -c * ((t = t / d - 1) * t * t * t - 1) + b
		},
		_handleRotation: function(parameters, dontcheck) {
			if(!supportedCSS && !this._img.complete && !dontcheck) {
				this._onLoadDelegate.push(parameters);
				return;
			}
			this._setupParameters(parameters);
			if(this._angle == this._parameters.animateTo) {
				this._rotate(this._angle);
			} else {
				this._animateStart();
			}
		},

		_BindEvents: function(events) {
			if(events && this._eventObj) {
				// Unbinding previous Events
				if(this._parameters.bind) {
					var oldEvents = this._parameters.bind;
					for(var a in oldEvents)
						if(oldEvents.hasOwnProperty(a))
						// TODO: Remove jQuery dependency
							jQuery(this._eventObj).unbind(a, oldEvents[a]);
				}

				this._parameters.bind = events;
				for(var a in events)
					if(events.hasOwnProperty(a))
					// TODO: Remove jQuery dependency
						jQuery(this._eventObj).bind(a, events[a]);
			}
		},

		_Loader: (function() {
			if(IE)
				return function() {
					var width = this._img.width;
					var height = this._img.height;
					this._imgWidth = width;
					this._imgHeight = height;
					this._img.parentNode.removeChild(this._img);

					this._vimage = this.createVMLNode('image');
					this._vimage.src = this._img.src;
					this._vimage.style.height = height + "px";
					this._vimage.style.width = width + "px";
					this._vimage.style.position = "absolute"; // FIXES IE PROBLEM - its only rendered if its on absolute position!
					this._vimage.style.top = "0px";
					this._vimage.style.left = "0px";
					this._aspectW = this._aspectH = 1;

					/* Group minifying a small 1px precision problem when rotating object */
					this._container = this.createVMLNode('group');
					this._container.style.width = width;
					this._container.style.height = height;
					this._container.style.position = "absolute";
					this._container.style.top = "0px";
					this._container.style.left = "0px";
					this._container.setAttribute('coordsize', width - 1 + ',' + (height - 1)); // This -1, -1 trying to fix ugly problem with small displacement on IE
					this._container.appendChild(this._vimage);

					this._rootObj.appendChild(this._container);
					this._rootObj.style.position = "relative"; // FIXES IE PROBLEM
					this._rootObj.style.width = width + "px";
					this._rootObj.style.height = height + "px";
					this._rootObj.setAttribute('id', this._img.getAttribute('id'));
					this._rootObj.className = this._img.className;
					this._eventObj = this._rootObj;
					var parameters;
					while(parameters = this._onLoadDelegate.shift()) {
						this._handleRotation(parameters, true);
					}
				}
			else return function() {
				this._rootObj.setAttribute('id', this._img.getAttribute('id'));
				this._rootObj.className = this._img.className;

				this._imgWidth = this._img.naturalWidth;
				this._imgHeight = this._img.naturalHeight;
				var _widthMax = Math.sqrt((this._imgHeight) * (this._imgHeight) + (this._imgWidth) * (this._imgWidth));
				this._width = _widthMax * 3;
				this._height = _widthMax * 3;

				this._aspectW = this._img.offsetWidth / this._img.naturalWidth;
				this._aspectH = this._img.offsetHeight / this._img.naturalHeight;

				this._img.parentNode.removeChild(this._img);

				this._canvas = document.createElement('canvas');
				this._canvas.setAttribute('width', this._width);
				this._canvas.style.position = "relative";
				this._canvas.style.left = -this._img.height * this._aspectW + "px";
				this._canvas.style.top = -this._img.width * this._aspectH + "px";
				this._canvas.Wilq32 = this._rootObj.Wilq32;

				this._rootObj.appendChild(this._canvas);
				this._rootObj.style.width = this._img.width * this._aspectW + "px";
				this._rootObj.style.height = this._img.height * this._aspectH + "px";
				this._eventObj = this._canvas;

				this._cnv = this._canvas.getContext('2d');
				var parameters;
				while(parameters = this._onLoadDelegate.shift()) {
					this._handleRotation(parameters, true);
				}
			}
		})(),

		_animateStart: function() {
			if(this._timer) {
				clearTimeout(this._timer);
			}
			this._animateStartTime = +new Date;
			this._animateStartAngle = this._angle;
			this._animate();
		},
		_animate: function() {
			var actualTime = +new Date;
			var checkEnd = actualTime - this._animateStartTime > this._parameters.duration;

			// TODO: Bug for animatedGif for static rotation ? (to test)
			if(checkEnd && !this._parameters.animatedGif) {
				clearTimeout(this._timer);
			} else {
				if(this._canvas || this._vimage || this._img) {
					var angle = this._parameters.easing(0, actualTime - this._animateStartTime, this._animateStartAngle, this._parameters.animateTo - this._animateStartAngle, this._parameters.duration);
					this._rotate((~~(angle * 10)) / 10);
				}
				if(this._parameters.step) {
					this._parameters.step(this._angle);
				}
				var self = this;
				this._timer = setTimeout(function() {
					self._animate.call(self);
				}, 10);
			}

			// To fix Bug that prevents using recursive function in callback I moved this function to back
			if(this._parameters.callback && checkEnd) {
				this._angle = this._parameters.animateTo;
				this._rotate(this._angle);
				this._parameters.callback.call(this._rootObj);
			}
		},

		_rotate: (function() {
			var rad = Math.PI / 180;
			if(IE)
				return function(angle) {
					this._angle = angle;
					this._container.style.rotation = (angle % 360) + "deg";
					this._vimage.style.top = -(this._rotationCenterY - this._imgHeight / 2) + "px";
					this._vimage.style.left = -(this._rotationCenterX - this._imgWidth / 2) + "px";
					this._container.style.top = this._rotationCenterY - this._imgHeight / 2 + "px";
					this._container.style.left = this._rotationCenterX - this._imgWidth / 2 + "px";

				}
			else if(supportedCSS)
				return function(angle) {
					this._angle = angle;
					this._img.style[supportedCSS] = "rotate(" + (angle % 360) + "deg)";
					this._img.style[supportedCSSOrigin] = this._parameters.center.join(" ");
				}
			else
				return function(angle) {
					this._angle = angle;
					angle = (angle % 360) * rad;
					// clear canvas	
					this._canvas.width = this._width; //+this._widthAdd;
					this._canvas.height = this._height; //+this._heightAdd;

					// REMEMBER: all drawings are read from backwards.. so first function is translate, then rotate, then translate, translate..
					this._cnv.translate(this._imgWidth * this._aspectW, this._imgHeight * this._aspectH); // at least center image on screen
					this._cnv.translate(this._rotationCenterX, this._rotationCenterY); // we move image back to its orginal 
					this._cnv.rotate(angle); // rotate image
					this._cnv.translate(-this._rotationCenterX, -this._rotationCenterY); // move image to its center, so we can rotate around its center
					this._cnv.scale(this._aspectW, this._aspectH); // SCALE - if needed ;)
					this._cnv.drawImage(this._img, 0, 0); // First - we draw image
				}

		})()
	}

	if(IE) {
		Wilq32.PhotoEffect.prototype.createVMLNode = (function() {
			document.createStyleSheet().addRule(".rvml", "behavior:url(#default#VML)");
			try {
				!document.namespaces.rvml && document.namespaces.add("rvml", "urn:schemas-microsoft-com:vml");
				return function(tagName) {
					return document.createElement('<rvml:' + tagName + ' class="rvml">');
				};
			} catch(e) {
				return function(tagName) {
					return document.createElement('<' + tagName + ' xmlns="urn:schemas-microsoft.com:vml" class="rvml">');
				};
			}
		})();
	}

})(jQuery);